Used car batteries are much, much cheaper. So as more BEVs come on road, that's obviously one way forward. Also $100/kWh is today. However, given how rapidly co

Used car batteries are much, much cheaper. So as more BEVs come on road, that's obviously one way forward. Also $100/kWh is today. However, given how rapidly costs have declined over the past three decades, nothing suggests that this is the final number. Finally, these are just Li-ion prices. Na-ion and Fe-ion are also very close to deployment now. Both of them cannot match the energy density of Li-ion, but that's fine. Grid storage depends on cost, not energy density anyway